desktop PC power supply questions
Posted on 2005-04-05
I have some questions regarding my eMachines 400i desktop (the power supply).
I've had it since 2001. I think around 2 years back it couldn't turn on one day, until I swapped the surge protector switch thinking it was a power issue. I assume that means the old surge protector no longer sources enough current to the desktop PC?
Now, here's the real question. Due to a lack of space, I cram some equipment onto a surge protector. All's fine until I added a DSL modem to the pack. The desktop still works ok. But half of the time, when it's off, it makes a hissing/humming noise like a quite fan I guess. I've never seen it like this until I added the DSL modem to the outlet. Is this just electrical interference from the modem or does it mean my load is too big on the circuit and the desktop is a bit under-powered? Or is the power supply slowly dying out due to old age? I did an estimate of the circuit load to be around 12A, no more than 15A.
FYI: equipment plugged into circuit includes: CRT monitor (~1A or 110W?), desktop PC (~6A or 600W?), laser printer (2A, but off most of the time), print server (0.2A), wireless router (0.5A), dsl modem (1A), and cordless phone.